It has an extended barrel inside of the QD suppressor and so far I've experienced a improvement in range and a slight improvement in accuracy. I'm happy it performed, I was pretty worried about connected two inner barrels together interfering with the performance. I don't have any FPS numbers yet as I don't have a chronograph, hopefully I'll pick one up soon and post up results.

So... Sorry to resurrect this hopefully you will come by this thread. How is your MP7 holding up with the "Power-up Suppressor"?

It broke my gun, the pressure of the inner barrels pushed the inner barrel on the MP7 rearward about 2mm. I had to buy a new outer barrel, inner barrel, and repair the clip that holds the barrel. DO NOT buy it.

It broke my gun, the pressure of the inner barrels pushed the inner barrel on the MP7 rearward about 2mm. I had to buy a new outer barrel, inner barrel, and repair the clip that holds the barrel. DO NOT buy it.

I actually did anyway I'm going to mess with it a little. I'm curious. There has to be a way to release all the tension on the barrel so there is just enough to keep them together but not enough to break it.

As far as alining the barrels goes if that doesn't work out right I bet I can wrap some tap around it or put a spacer on of some sort. Would you happen to still have the barrel? I was wondering if where the BB transitions is like a funnel. If not, any idea how to make it that way? If I could open it up and slowly tighten the bore that would allow for a smooth transition and eliminate any jamming issues.